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The stable generation of TE01 and TM01 beams is demonstrated through a novel all-fiber fused coupler fabricated from a standard single mode fiber (SMF) and a custom air-core fiber. The fundamental mode in the SMF is directly coupled to the TM01 or TE01 mode by appropriately phase matching the modes in the fibers resulting in efficiency of ~67% and ~85%, and polarization purity of 70% and 82%, respectively...
Orbital angular momentum (OAM) beam generation has been investigated using all-fibre and free space configurations. In the first approach, the composite fused coupler is based on a single mode fibre (SMF) and an air-core fibre. The second approach exploits geometrical phase introduced by nanostructuring of silica glass. Both approaches are demonstrated to achieve power coupling efficiencies in excess...
We report our studies on the propagation of light beams possessing orbital angular momentum (OAM) through optical fibers having different index profiles with the emphasis on stable propagation. Simulation results on propagation characteristics of OAM beam in different index fibers are presented. We also present preliminary experimental results validating the same. Presented study is expected to be...
The enhanced Goos-Hänchen (GH) shift due to surface plasmons excitation at the metal-dielectric interface is measured using Stokes polarimetry and is found to agree well with theoretical calculation and position-sensitive detector based measurement
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